Barnett Scorpion Install Question and Oil
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Cruiser
Joined: Jul 2010
Posts: 189
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From: Sudbury, Ontario
Barnett Scorpion Install Question and Oil
Going to be installing a Scorpion Clutch before heading to Florida for some March riding. Bike had to come apart due to a trans leak.
Anyways, the old factory clutch was used with the SE clutch spring. I'm wondering what springs I should use for the scorpion install? Clutch came with a few different options but am unsure what kind of spring pressure the current spring gave. I figure could stick with a similar amount and be fine?
Secondly, what oil are people using? I have a baker comp installed so need something that will make both the clutch and compensator happy. Searching seemed to show alot of people use ATF type F??? Will that be good for both comp and clutch?
Finally any install tips are welcomed.
Thanks
Anyways, the old factory clutch was used with the SE clutch spring. I'm wondering what springs I should use for the scorpion install? Clutch came with a few different options but am unsure what kind of spring pressure the current spring gave. I figure could stick with a similar amount and be fine?
Secondly, what oil are people using? I have a baker comp installed so need something that will make both the clutch and compensator happy. Searching seemed to show alot of people use ATF type F??? Will that be good for both comp and clutch?
Finally any install tips are welcomed.
Thanks
Outstanding HDF Member
Joined: Sep 2010
Posts: 2,630
Likes: 185
From: Mountain West, Big Sky Country
check with barnett, they have a recommended fluid.
my barnett clutch recommended atf and thats what is in it.
the se spring is a tough pull.
spring color/pounds per inch chart (I believe):
SE (no color) 386#
police (pink) 364 #
stock 103 (yellow) 320#
stock 88 (blue) 300#
lite (white) 257#
i would check the barnett spring for something close. the se spring is overall ok but a bit overkill.
ive put a little over 10k on my clutch with no issues. i recently changed fluids and switched over to B&M trick shift atf. it works great and its blue so leaks are easy identified if necessary.
my barnett clutch recommended atf and thats what is in it.
the se spring is a tough pull.
spring color/pounds per inch chart (I believe):
SE (no color) 386#
police (pink) 364 #
stock 103 (yellow) 320#
stock 88 (blue) 300#
lite (white) 257#
i would check the barnett spring for something close. the se spring is overall ok but a bit overkill.
ive put a little over 10k on my clutch with no issues. i recently changed fluids and switched over to B&M trick shift atf. it works great and its blue so leaks are easy identified if necessary.
Last edited by bigskyroadglide; Jan 31, 2017 at 08:55 PM.
Seasoned HDF Member
Joined: May 2012
Posts: 32,934
Likes: 36,028
From: Carlsbad, CA
Not your question, but I'm very happy with:
- SE clutch
- SE clutch diaphragm spring
- Baker Compensator...at least with 1,000 miles
- HD Formula +
I really don't understand why people would use ATF in the primary, when Formula+ and other primary specific lubes are specific for this application.
- SE clutch
- SE clutch diaphragm spring
- Baker Compensator...at least with 1,000 miles
- HD Formula +
I really don't understand why people would use ATF in the primary, when Formula+ and other primary specific lubes are specific for this application.
Outstanding HDF Member
Joined: Sep 2010
Posts: 2,630
Likes: 185
From: Mountain West, Big Sky Country
Not your question, but I'm very happy with:
- SE clutch
- SE clutch diaphragm spring
- Baker Compensator...at least with 1,000 miles
- HD Formula +
I really don't understand why people would use ATF in the primary, when Formula+ and other primary specific lubes are specific for this application.
- SE clutch
- SE clutch diaphragm spring
- Baker Compensator...at least with 1,000 miles
- HD Formula +
I really don't understand why people would use ATF in the primary, when Formula+ and other primary specific lubes are specific for this application.
each bike calls for a specific fluid as identified by the clutch manufacturer. HD clutch gets formula plus, other manufactures have different requirements. hope this helps
Seasoned HDF Member
Joined: May 2012
Posts: 32,934
Likes: 36,028
From: Carlsbad, CA
triGeezer, i use atf as that is what barnett recommends. i also use straight 40 weight motor oil in one primary and formula plus in another.
W
each bike calls for a specific fluid as identified by the clutch manufacturer. HD clutch gets formula plus, other manufactures have different requirements. hope this helps
W
each bike calls for a specific fluid as identified by the clutch manufacturer. HD clutch gets formula plus, other manufactures have different requirements. hope this helps
Tourer
Joined: Feb 2015
Posts: 345
Likes: 19
From: Indiana
Going to be installing a Scorpion Clutch before heading to Florida for some March riding. Bike had to come apart due to a trans leak.
Anyways, the old factory clutch was used with the SE clutch spring. I'm wondering what springs I should use for the scorpion install? Clutch came with a few different options but am unsure what kind of spring pressure the current spring gave. I figure could stick with a similar amount and be fine?
Secondly, what oil are people using? I have a baker comp installed so need something that will make both the clutch and compensator happy. Searching seemed to show alot of people use ATF type F??? Will that be good for both comp and clutch?
Finally any install tips are welcomed.
Thanks
Anyways, the old factory clutch was used with the SE clutch spring. I'm wondering what springs I should use for the scorpion install? Clutch came with a few different options but am unsure what kind of spring pressure the current spring gave. I figure could stick with a similar amount and be fine?
Secondly, what oil are people using? I have a baker comp installed so need something that will make both the clutch and compensator happy. Searching seemed to show alot of people use ATF type F??? Will that be good for both comp and clutch?
Finally any install tips are welcomed.
Thanks
I just looked at the install sheet on that clutch and they "Barnett" don't list a certain type of primary fluid in their instructions, I would give them a phone call myself.
I run Amsoil Primary formula myself with my Barnett clutch plates.
Outstanding HDF Member
Joined: Sep 2010
Posts: 2,630
Likes: 185
From: Mountain West, Big Sky Country
i am running the scorpion and atf in the primary with a hydraulic clutch vs a cable. that could be a difference.
i feel the engagement is very similar. i run this clutch behind a 120R, so it could also feel different behind something with less hp and tq.
i personally have no issue with atf, it works and works well for me and i easily put up 25k miles a year between multiple bikes.
i switched recently from type f to B&M trick shift. i did not notice a change other thsn color.
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Joined: Jul 2015
Posts: 8,538
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From: SF Bay area
I run Mobil 1 syn ATF, with a few ounces of Lubeguard highly friction modified ATF supplement.
Only other thing I ever tried that comes close is Redline ATF.
(Stock HD assist & slip clutch)
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Only other thing I ever tried that comes close is Redline ATF.
(Stock HD assist & slip clutch)
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Road Master
Joined: Mar 2013
Posts: 1,220
Likes: 14
From: chatham il
I've spoke with Barnett on the fluid several times. What they do not what ran in the primary with there scorpion clutch is Harley's formula+ they claim it is just to sticky other than that atf is not necessary for any particular reason. I've always ran mobil1 vtwin 20w50 in mine with no issues and they said it will be perfectly fine. You will be able to run less spring pressure than you are used to with the stock clutch becouse the scorpion clutch plates have a lot more surface area since your installing the smaller diameter scorpion hub which makes your lever pull light. I'm assuming this is a new kit that you have purchased recently? The reason I ask is the older scorpion kits had a 10 and 10 plate kit. 10 steels and 10 fiber plates. Make sure you have there newer plate kit that includes a 9and9 plate setup. The stack thickness on the 9and 9 kit is slightly thinner which cured some dragging issues the 10 plate kits had. Also the 9 plate kit has thicker steel plates which are more resistant to warping. I would have to go to the garage to look at the spring ratings as far as pound ratings go but I know I'm running 3 light and 3 medium springs. No slipping at all with my 103 with cams and the clutch lever pull is sweet. Honestly my bike would be fine with all 6 light springs but I threw in 3 mediums before I dynoed it just to be sure the tuner didn't call me with slippage complaints. The lever still feels great so I never bothered to change it back to all light springs. Be careful with this clutch though it has more holding power than the stock clutch basket can handle. I busted my stock basket from dumping the clutch a few times (burnouts). I'm in the process of upgrading to the scorpion basket.
Last edited by ridedaddy; Feb 1, 2017 at 01:54 AM.
